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KEY CONCEPT Cellular respiration is an aerobic process with two main stages.

KEY CONCEPT Cellular respiration is an aerobic process with two main stages. Glycolysis is needed for cellular respiration. The products of glycolysis enter cellular respiration when oxygen is available. two ATP molecules are used to split glucose four ATP molecules are produced.

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KEY CONCEPT Cellular respiration is an aerobic process with two main stages.

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  1. KEY CONCEPT Cellular respiration is an aerobic process with two main stages.

  2. Glycolysis is needed for cellular respiration. • The products of glycolysis enter cellular respiration when oxygen is available. • two ATP molecules are used to split glucose • four ATP molecules are produced • two molecules of NADH produced • two molecules of pyruvate produced

  3. The Krebs cycle is the first main part of cellular respiration. • Pyruvate is broken down before the Krebs cycle. • carbon dioxide released • NADH produced • coenzyme A (CoA) bonds to two-carbon molecule

  4. The Krebs cycle produces energy-carrying molecules.

  5. The Krebs cycle produces energy-carrying molecules. • NADH and FADH2 are made • intermediate molecule withCoA enters Krebs cycle • citric acid(six-carbon molecule)is formed • citric acid is broken down,carbon dioxide is released,and NADH is made • five-carbon molecule is broken down, carbon dioxide is released, NADH and ATP are made • four-carbon molecule is rearranged

  6. The electron transport chain is the second main part of cellular respiration. • The electron transport chain uses NADH and FADH2 to make ATP. • high-energy electrons enter electron transport chain • energy is used to transport hydrogen ions across the inner membrane • hydrogen ionsflow through achannel in themembrane

  7. The electron transport chain is the second main part of cellular respiration. • The breakdown of one glucose molecule produces up to38 molecules of ATP. • The electron transport chain uses NADH and FADH2 to make ATP. • ATP synthase produces ATP • oxygen picks up electrons and hydrogen ions • water is released as a waste product

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